To find all the divisors of the number 6,982,580:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 6,982,580:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
6,982,580 = 22 × 5 × 11 × 17 × 1,867
6,982,580 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 6,982,580
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
2
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 5 =
10
prime factor =
11
prime factor =
17
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 2 × 17 =
34
composite factor = 2
2 × 11 =
44
composite factor = 5 × 11 =
55
composite factor = 2
2 × 17 =
68
composite factor = 5 × 17 =
85
composite factor = 2 × 5 × 11 =
110
composite factor = 2 × 5 × 17 =
170
composite factor = 11 × 17 =
187
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2
2 × 5 × 17 =
340
composite factor = 2 × 11 × 17 =
374
composite factor = 2
2 × 11 × 17 =
748
composite factor = 5 × 11 × 17 =
935
prime factor =
1,867
composite factor = 2 × 5 × 11 × 17 =
1,870
This list continues below...
... This list continues from above
composite factor = 2 × 1,867 =
3,734
composite factor = 2
2 × 5 × 11 × 17 =
3,740
composite factor = 2
2 × 1,867 =
7,468
composite factor = 5 × 1,867 =
9,335
composite factor = 2 × 5 × 1,867 =
18,670
composite factor = 11 × 1,867 =
20,537
composite factor = 17 × 1,867 =
31,739
composite factor = 2
2 × 5 × 1,867 =
37,340
composite factor = 2 × 11 × 1,867 =
41,074
composite factor = 2 × 17 × 1,867 =
63,478
composite factor = 2
2 × 11 × 1,867 =
82,148
composite factor = 5 × 11 × 1,867 =
102,685
composite factor = 2
2 × 17 × 1,867 =
126,956
composite factor = 5 × 17 × 1,867 =
158,695
composite factor = 2 × 5 × 11 × 1,867 =
205,370
composite factor = 2 × 5 × 17 × 1,867 =
317,390
composite factor = 11 × 17 × 1,867 =
349,129
composite factor = 2
2 × 5 × 11 × 1,867 =
410,740
composite factor = 2
2 × 5 × 17 × 1,867 =
634,780
composite factor = 2 × 11 × 17 × 1,867 =
698,258
composite factor = 2
2 × 11 × 17 × 1,867 =
1,396,516
composite factor = 5 × 11 × 17 × 1,867 =
1,745,645
composite factor = 2 × 5 × 11 × 17 × 1,867 =
3,491,290
composite factor = 2
2 × 5 × 11 × 17 × 1,867 =
6,982,580
48 factors (divisors)
What times what is 6,982,580?
What number multiplied by what number equals 6,982,580?
All the combinations of any two natural numbers whose product equals 6,982,580.
1 × 6,982,580 = 6,982,580
2 × 3,491,290 = 6,982,580
4 × 1,745,645 = 6,982,580
5 × 1,396,516 = 6,982,580
10 × 698,258 = 6,982,580
11 × 634,780 = 6,982,580
17 × 410,740 = 6,982,580
20 × 349,129 = 6,982,580
22 × 317,390 = 6,982,580
34 × 205,370 = 6,982,580
44 × 158,695 = 6,982,580
55 × 126,956 = 6,982,580
68 × 102,685 = 6,982,580
85 × 82,148 = 6,982,580
110 × 63,478 = 6,982,580
170 × 41,074 = 6,982,580
187 × 37,340 = 6,982,580
220 × 31,739 = 6,982,580
340 × 20,537 = 6,982,580
374 × 18,670 = 6,982,580
748 × 9,335 = 6,982,580
935 × 7,468 = 6,982,580
1,867 × 3,740 = 6,982,580
1,870 × 3,734 = 6,982,580
24 unique multiplications The final answer:
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